Colorado officials say 2 children, 2 adults killed in apparent murder-suicide

At least four people are dead following an apparent murder-suicide at a home in Colorado, authorities said Sunday.

Deputies were called to a home in the Colorado Springs area at around 10 a.m. Saturday following a report of someone injured on the scene who needed help, according to the El Paso County Sheriff’s office.

"When deputies entered the residence, they found two juveniles and two adults deceased," the sheriff's office said. 

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The incident and call on Saturday prompted a large police response. 

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At least one witness told The Gazette that said he saw a large, black armored vehicle transporting a sheriff's office tactical support unit in his normally quiet neighborhood. 

"It felt like we were being invaded," Joe, who only gave his first name, told The Gazette. 

Authorities said a "reverse 911″ or Everbridge, was sent to families in the community within a 2-mile radius, asking them to stay inside and lock their doors and windows. 

It was unclear who carried out the attack, or if the victims were related. Their identities have not been released until positive identification by the Coroner's Office and notification of next of kin.

There is not a threat to the community at this time, the sheriff's office noted. 

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The investigation is ongoing.